The bible doesn't mention "AN antichrist," and DEFINITELY not in the context of the Devil's child, that's purely the invention of pop-culture. Jesus Himself uses the word but in the context we today would call "antis," ordinary people who want to shut him up

If you accept the Beasts of Revelation as "the antichrist" because they're most powerful of the False Profits… well, skyscraper-sized dragons with seven heads aren't exactly hard to find